Qt编写的列车运行预警系统（包含.pro文件）。主要功能为收到定位信息并显示本车和前车的速度里程，对距离过近，紧急停车等情况做出报警。-Written in Qt train warning system (including the. Pro file). Main function is to receive location information and displays the speed of vehicles and mileage of the vehicle in front, the distance is too close, etc. to make an emergency stop alarm.